Re: [Emc-users] belt calculators, a PITA

2016-10-16 Thread Gene Heskett 
On Sunday 16 October 2016 09:59:08 MC Cason wrote:

> Gene,
>
>*snip again*
>
> On 10/16/2016 08:09 AM, Gene Heskett wrote:
> > On Sunday 16 October 2016 08:50:35 MC Cason wrote:
> >> I really like their belt calculator, but their shipping charges are
> >> excessive.  I usually find the correct belt size, and then go and
> >> find them on Ebay, or Amazon.
> >>
> >> Finding XL belts are fairly simple.  The part # for a gates
> >> belt goes like this:
> >>(Length to 3 places, without decimal)XL(width to 3 places,
> >> without decimal).  The length for a XL belt is teeth x 2.  A 79
> >> tooth belt is 15.8" long.
> >>
> >> Assuming a 1/4" wide 79 tooth belt, the part # would be
> >> 158XL025: http://www.ebay.com/itm/111964143707
> >
> > My pulleys are all either 10mm wide, or 3/8ths. Essentially Mox
> > Nixs. :)
>
>158LX037 - www.ebay.com/itm/111964018919
>
> > Probably not today, but before I put power on that motor, I'll make
> > the taperlock I described.  Set screws just don't cut it IMO.
>
>Have you tried spot drilling the shaft where the setscrews go?  I
> have done that a few times.
>
>I was going to respond to your other post, but I'll respond here...
>
>I have used aluminum pulleys in industry for years, without
> problems.  Worrying about whether the aluminum is going to cold flow
> in the next decade is fairly useless.  If the hub is thick enough to
> withstand the stress from the initial tightening, it will last a long
> time.  Worrying about a galvanic reaction between dissimilar metals is
> equally useless.  Unless your shop stays saturated in water, I
> wouldn't worry about it.  You did say that you keep your shop shirt
> sleeve comfortable.
>
>I live 1 mile from the Mississippi river, and 100 feet from a lake,
> which means that the humidity here stays high.  Everything rusts FAST!
> I DO have problems with galvanic reactions, but it's on the order of
> years, not months.

Good to hear, all of it. I'd maybe flat the shaft, but those setscrews 
aren't either big enough, nor long enough to not work loose, junking the 
holes in the pulley.  If I flat or drill the stub, I'll replace the 
screws with much longer socket head cap screws.  That is a thought, and 
may outlast me...  And its at least a days fooling with TLM to do it. I 
think I'm convinced. ;-)

Again, Thank you very much MC Cason.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] belt calculators, a PITA

2016-10-16 Thread MC Cason 
Gene,

   *snip again*

On 10/16/2016 08:09 AM, Gene Heskett wrote:
> On Sunday 16 October 2016 08:50:35 MC Cason wrote:
>
>> I really like their belt calculator, but their shipping charges are
>> excessive.  I usually find the correct belt size, and then go and find
>> them on Ebay, or Amazon.
>>
>> Finding XL belts are fairly simple.  The part # for a gates belt
>> goes like this:
>>(Length to 3 places, without decimal)XL(width to 3 places,
>> without decimal).  The length for a XL belt is teeth x 2.  A 79 tooth
>> belt is 15.8" long.
>>
>> Assuming a 1/4" wide 79 tooth belt, the part # would be 158XL025:
>> http://www.ebay.com/itm/111964143707
> My pulleys are all either 10mm wide, or 3/8ths. Essentially Mox Nixs. :)
   158LX037 - www.ebay.com/itm/111964018919

> Probably not today, but before I put power on that motor, I'll make the
> taperlock I described.  Set screws just don't cut it IMO.

   Have you tried spot drilling the shaft where the setscrews go?  I 
have done that a few times.

   I was going to respond to your other post, but I'll respond here...

   I have used aluminum pulleys in industry for years, without 
problems.  Worrying about whether the aluminum is going to cold flow in 
the next decade is fairly useless.  If the hub is thick enough to 
withstand the stress from the initial tightening, it will last a long 
time.  Worrying about a galvanic reaction between dissimilar metals is 
equally useless.  Unless your shop stays saturated in water, I wouldn't 
worry about it.  You did say that you keep your shop shirt sleeve 
comfortable.

   I live 1 mile from the Mississippi river, and 100 feet from a lake, 
which means that the humidity here stays high.  Everything rusts FAST!  
I DO have problems with galvanic reactions, but it's on the order of 
years, not months.


>
>>> Thank you very much MC Cason.
>>>
>>> Cheers, Gene Heskett
>
> Cheers, Gene Heskett


-- 
MC Cason
Eagle3D - Created by Matthias Weißer
github.com/mcason/Eagle3D



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Re: [Emc-users] belt calculators, a PITA

2016-10-16 Thread Gene Heskett 
On Sunday 16 October 2016 08:50:35 MC Cason wrote:

> Gene,
>
>*snip*
>
> On 10/15/2016 11:02 PM, Gene Heskett wrote:
> > Looks good. I didn't look to see if they had a 79 tooth version,
> > likely not, but I can probably rig it so the 80 tooth will work. 
> > But I'll have to call them Monday since their checkout is actually a
> > registration.
> >
> >>  This is my go-to belt calculator:
> >> https://sdp-si.com/eStore/CenterDistanceDesigner
> >>
> >> Desired center distance: 4.8750"
> >> 79 grooves - 4.8582"
> >> 80 grooves - 4.9591"
> >> 81 grooves - 5.0599"
> >>
> >> Actual screenshot sent to you as PM.
>
>Not knowing the width of your pulleys, here are the SDP-SI part
> numbers for 79 tooth belts:
> 1/4"   - A 6R 3-079025 -
> http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079025
> 5/16" - A 6R 3-079031 -
> http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079031
> 3/8"   - A 6R 3-079037 -
> http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079037
> 1/2"   - A 6R 3-079050 -
> http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079050
>
>
>I really like their belt calculator, but their shipping charges are
> excessive.  I usually find the correct belt size, and then go and find
> them on Ebay, or Amazon.
>
>Finding XL belts are fairly simple.  The part # for a gates belt
> goes like this:
>   (Length to 3 places, without decimal)XL(width to 3 places,
> without decimal).  The length for a XL belt is teeth x 2.  A 79 tooth
> belt is 15.8" long.
>
>Assuming a 1/4" wide 79 tooth belt, the part # would be 158XL025:
> http://www.ebay.com/itm/111964143707

My pulleys are all either 10mm wide, or 3/8ths. Essentially Mox Nixs. :)

Probably not today, but before I put power on that motor, I'll make the 
taperlock I described.  Set screws just don't cut it IMO.

> > Thank you very much MC Cason.
> >
> > Cheers, Gene Heskett


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] belt calculators, a PITA

2016-10-16 Thread MC Cason 
Gene,

   *snip*

On 10/15/2016 11:02 PM, Gene Heskett wrote:
>
> Looks good. I didn't look to see if they had a 79 tooth version, likely
> not, but I can probably rig it so the 80 tooth will work.  But I'll have
> to call them Monday since their checkout is actually a registration.
>
>>  This is my go-to belt calculator:
>> https://sdp-si.com/eStore/CenterDistanceDesigner
>>
>> Desired center distance: 4.8750"
>> 79 grooves - 4.8582"
>> 80 grooves - 4.9591"
>> 81 grooves - 5.0599"
>>
>> Actual screenshot sent to you as PM.

   Not knowing the width of your pulleys, here are the SDP-SI part 
numbers for 79 tooth belts:
1/4"   - A 6R 3-079025 - 
http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079025
5/16" - A 6R 3-079031 - 
http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079031
3/8"   - A 6R 3-079037 - 
http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079037
1/2"   - A 6R 3-079050 - 
http://shop.sdp-si.com/catalog/product/?id=A%206R%203-079050


   I really like their belt calculator, but their shipping charges are 
excessive.  I usually find the correct belt size, and then go and find 
them on Ebay, or Amazon.

   Finding XL belts are fairly simple.  The part # for a gates belt goes 
like this:
  (Length to 3 places, without decimal)XL(width to 3 places, without 
decimal).  The length for a XL belt is teeth x 2.  A 79 tooth belt is 
15.8" long.

   Assuming a 1/4" wide 79 tooth belt, the part # would be 158XL025:
http://www.ebay.com/itm/111964143707


> Thank you very much MC Cason.
>
> Cheers, Gene Heskett




-- 
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Eagle3D - Created by Matthias Weißer
github.com/mcason/Eagle3D



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Re: [Emc-users] belt calculators, a PITA + taperlock thoughts

2016-10-16 Thread Gene Heskett 
On Sunday 16 October 2016 03:26:55 Roland Jollivet wrote:

> Hi Gene
>
> Did you try this one  ?
> It's a bit confusing though, on the order of parameters to select.
> Just click about...
>
> Roland

I played with that one the most, because it did look promising. But after 
choosing the belt style, xl, and the tooth counts of the pulleys, it 
seemed to freeze up and while the c-c length could be entered, nothing 
came out except the pitch diameters of the pulleys.  No clue if its 
disabled over the weekend (I've encountered that before) or what.  Ahh, 
made it work, I had to click on the right hand panel. And the update 
time lag is done so silently you have to sit & stare at the numbers to 
see if they change. And they have a Kevlar version of the 160xl037 at 
less than a fiver a copy.  Thats a good price for a Kevlar backing.

I'll see if I can get the Z motor mounted & measured by tomorrow and get 
a pair of both from them. And it looks as if they have them in 2 tooth 
increments. But that one is glass reinforcement only at $4.17 in onsies.

Change of topic:

This screw, a 2505, has only a 10mm stud to drive it with, and its a bit 
short, forcing me to put the pulley on such that the set screws are 
behind.  With the pulley turned around, its hub is long enough the set 
screws are off the end of the shaft.  The stub has no flats, so if the 
screws damage the shaft, the pulley will be locked on. Fugly thought 
that...

When I did TLM, I was working with a handfull of the metal change gears, 
so I sacrificed two of them by boring a taper for a miniature browning 
style taperlock hub I made on TLM, in a 40 tooth I put on the motor, and 
an 80 tooth I put on the screw. Used 8-32 drawbolts.  That has Just 
Worked(TM), zero slippage even when its accidentally pushing the locked 
down (I thought) tailstock to the right on the ways. :)

I can make more of those hubs, out of steel rod. The question is, since 
alu will cold flow under the pressure of the terminal screw when used as 
an electrical conductor, will it cold flow and release the grip on the 
shaft if I do that in an aluminum hub? I would turn the pulley around if 
I did that since that would put the radius of the pulley over the 
squeeze and put the belt tension directly over this stub. The extended 
hub would serve for the draw screws to pull against.

When I did TLM. I hacksawed the split, but I can EDM those slits like I 
did to grab the end of the x screw because it leaves no burrs, and 
having 6 metal petals to evenly apply the squeeze as opposed to 
forceably deforming the single slit flange sure seems like the better 
way to do it.  The only thing I'd worry about is  will that bulk cross 
section of the pulley cold flow and release the grip before I lose mine? 
Theres plenty of bulk in that pulley since its a 40 tooth, nominally 
2.5" in diameter, it sure seems like it ought to work.

Secondary question is, since this is dissimilar metals, what lube would 
be recommended on the taper so that I can move the screws to the 
threaded holes in the flange and jack it back apart again without the 
screws acting like drill bits in that much softer aluminum.  Milk of 
Magnesia, or some sort of never-seize? One could also interpose a 
suitable steel "fender" washer, drilled for draw bolt clearance, for the 
screw tips to push against. I can do that, so the lubricant is the $64 
question I guess.  Recommendations?

[snip the rest of weekly paper]

Thanks everybody.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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[Emc-users] belt calculators, a PITA

2016-10-16 Thread Roland Jollivet 
Hi Gene

Did you try this one  ? It's
a bit confusing though, on the order of parameters to select. Just click
about...

Roland



On 16 October 2016 at 06:02, Gene Heskett  wrote:

> On Saturday 15 October 2016 22:29:50 MC Cason wrote:
>
> > Gene,
> >
> > On 10/15/2016 08:53 PM, Gene Heskett wrote:
> > > Greetings all;
> > >
> > > I just spent about 3 hours playing around with the 20 or so belt
> > > calculators google gave me links to, but not on of them could give
> > > me any answers.
> > >
> > > One would think, for an XL belt that
> > >
> > > 1. width is a never mind since xl's are available in a plethora of
> > > widths, none of which should have any effect on the profile the belt
> > > assumes when snug enough to do the job.
> > >
> > > 2. Its a pair of pulleys for xl belting, and the pitch diameter can
> > > be instantly defined by the belt profile, xl in this case, and
> > > minorly the number of teeth might have a slight effect when dealing
> > > with very low tooth count pulleys.  The belt pitch is a nearly
> > > constant height above the teeth, and the teeth diameter is derived
> > > from the xl tooth length times the number of teeth.
> > >
> > > I am shooting for a shaft center to center between 4.875 and 5.0".
> > >
> > > Given that center to center on a pair of xl pulleys of 20 teeth and
> > > 40 teeth, that really should be all that its needed to know to tell
> > > me I need a 112? tooth belt.  Then its up to me to see if I've room
> > > for the pull needed to use the next higher tooth count belt.  Or do
> > > I mount an idler to adjust it so a stock belt will work?
> > >
> > > I am probably going to go thru that same eye of the needle for the Z
> > > belt, but I've some mounting brackets yet to be whittled out to get
> > > a 2505x1450mm screw mounted straight.
> > >
> > > Does anyone have a belt calculator that actually works?
> > >
> > > Thanks everybody.
> > >
> > > Cheers, Gene Heskett
> >
> Looks good. I didn't look to see if they had a 79 tooth version, likely
> not, but I can probably rig it so the 80 tooth will work.  But I'll have
> to call them Monday since their checkout is actually a registration.
>
> > This is my go-to belt calculator:
> > https://sdp-si.com/eStore/CenterDistanceDesigner
> >
> > Desired center distance: 4.8750"
> >79 grooves - 4.8582"
> >80 grooves - 4.9591"
> >81 grooves - 5.0599"
> >
> >Actual screenshot sent to you as PM.
>
> Thank you very much MC Cason.
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page 
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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Re: [Emc-users] belt calculators, a PITA

2016-10-15 Thread Gene Heskett 
On Saturday 15 October 2016 22:29:50 MC Cason wrote:

> Gene,
>
> On 10/15/2016 08:53 PM, Gene Heskett wrote:
> > Greetings all;
> >
> > I just spent about 3 hours playing around with the 20 or so belt
> > calculators google gave me links to, but not on of them could give
> > me any answers.
> >
> > One would think, for an XL belt that
> >
> > 1. width is a never mind since xl's are available in a plethora of
> > widths, none of which should have any effect on the profile the belt
> > assumes when snug enough to do the job.
> >
> > 2. Its a pair of pulleys for xl belting, and the pitch diameter can
> > be instantly defined by the belt profile, xl in this case, and
> > minorly the number of teeth might have a slight effect when dealing
> > with very low tooth count pulleys.  The belt pitch is a nearly
> > constant height above the teeth, and the teeth diameter is derived
> > from the xl tooth length times the number of teeth.
> >
> > I am shooting for a shaft center to center between 4.875 and 5.0".
> >
> > Given that center to center on a pair of xl pulleys of 20 teeth and
> > 40 teeth, that really should be all that its needed to know to tell
> > me I need a 112? tooth belt.  Then its up to me to see if I've room
> > for the pull needed to use the next higher tooth count belt.  Or do
> > I mount an idler to adjust it so a stock belt will work?
> >
> > I am probably going to go thru that same eye of the needle for the Z
> > belt, but I've some mounting brackets yet to be whittled out to get
> > a 2505x1450mm screw mounted straight.
> >
> > Does anyone have a belt calculator that actually works?
> >
> > Thanks everybody.
> >
> > Cheers, Gene Heskett
>
Looks good. I didn't look to see if they had a 79 tooth version, likely 
not, but I can probably rig it so the 80 tooth will work.  But I'll have 
to call them Monday since their checkout is actually a registration.

> This is my go-to belt calculator:
> https://sdp-si.com/eStore/CenterDistanceDesigner
>
> Desired center distance: 4.8750"
>79 grooves - 4.8582"
>80 grooves - 4.9591"
>81 grooves - 5.0599"
>
>Actual screenshot sent to you as PM.

Thank you very much MC Cason.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] belt calculators, a PITA

2016-10-15 Thread MC Cason 
Gene,

On 10/15/2016 08:53 PM, Gene Heskett wrote:
> Greetings all;
>
> I just spent about 3 hours playing around with the 20 or so belt
> calculators google gave me links to, but not on of them could give me
> any answers.
>
> One would think, for an XL belt that
>
> 1. width is a never mind since xl's are available in a plethora of
> widths, none of which should have any effect on the profile the belt
> assumes when snug enough to do the job.
>
> 2. Its a pair of pulleys for xl belting, and the pitch diameter can be
> instantly defined by the belt profile, xl in this case, and minorly the
> number of teeth might have a slight effect when dealing with very low
> tooth count pulleys.  The belt pitch is a nearly constant height above
> the teeth, and the teeth diameter is derived from the xl tooth length
> times the number of teeth.
>
> I am shooting for a shaft center to center between 4.875 and 5.0".
>
> Given that center to center on a pair of xl pulleys of 20 teeth and 40
> teeth, that really should be all that its needed to know to tell me I
> need a 112? tooth belt.  Then its up to me to see if I've room for the
> pull needed to use the next higher tooth count belt.  Or do I mount an
> idler to adjust it so a stock belt will work?
>
> I am probably going to go thru that same eye of the needle for the Z
> belt, but I've some mounting brackets yet to be whittled out to get a
> 2505x1450mm screw mounted straight.
>
> Does anyone have a belt calculator that actually works?
>
> Thanks everybody.
>
> Cheers, Gene Heskett

This is my go-to belt calculator:
https://sdp-si.com/eStore/CenterDistanceDesigner

Desired center distance: 4.8750"
   79 grooves - 4.8582"
   80 grooves - 4.9591"
   81 grooves - 5.0599"

   Actual screenshot sent to you as PM.





-- 
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Eagle3D - Created by Matthias Weißer
github.com/mcason/Eagle3D



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[Emc-users] belt calculators, a PITA

2016-10-15 Thread Gene Heskett 
Greetings all;

I just spent about 3 hours playing around with the 20 or so belt 
calculators google gave me links to, but not on of them could give me 
any answers.

One would think, for an XL belt that

1. width is a never mind since xl's are available in a plethora of 
widths, none of which should have any effect on the profile the belt 
assumes when snug enough to do the job.

2. Its a pair of pulleys for xl belting, and the pitch diameter can be 
instantly defined by the belt profile, xl in this case, and minorly the 
number of teeth might have a slight effect when dealing with very low 
tooth count pulleys.  The belt pitch is a nearly constant height above 
the teeth, and the teeth diameter is derived from the xl tooth length 
times the number of teeth.

I am shooting for a shaft center to center between 4.875 and 5.0".

Given that center to center on a pair of xl pulleys of 20 teeth and 40 
teeth, that really should be all that its needed to know to tell me I 
need a 112? tooth belt.  Then its up to me to see if I've room for the 
pull needed to use the next higher tooth count belt.  Or do I mount an 
idler to adjust it so a stock belt will work?

I am probably going to go thru that same eye of the needle for the Z 
belt, but I've some mounting brackets yet to be whittled out to get a 
2505x1450mm screw mounted straight.

Does anyone have a belt calculator that actually works?

Thanks everybody.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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